Business to Business Showcase Please e-mail form to cindy@midmainechamber.comĀ _2023 B2B Showcase Registration Form. 03.22.23. UPDATED With over 100 exhibitors and 2,000+ attendees, the Business to Business Showcase is great for networking, and it’s the premier trade show in the area! Click here to see photos of our 2022 B2B!